How to change Automation Trigger from "Changes:" to "Changes To:"

Hello Community,
I have set up a sheet and a form. The form has various drop-downs asking different fellows for their unique identity numbers.
I am trying to copy the rows to the fellow's specific sheet when the drop-down is their unique identifier number.

I am setting it up for 20 fellow drop downs, out of these the 19 drop downs are giving me the option to select the identifier number in the automation and it displays
When "Unique Identifier, Changes to: and I can select the identifier.
But for Fellow 1, it only gives me the option of "Changes" and does not let me select or enter the unique identifier.
Am I missing something here?
Fellow 1 is set up similarly

to other fellow columns as drop-down.

Help will be appreciated.

Answers